chore: add publish action

.github/workflows/publish.yml

@@ -0,0 +1,27 @@
+name: Publish to NPM
+
+on:
+  workflow_dispatch:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Node
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14.x'
+          registry-url: 'https://registry.npmjs.org'
+      - name: Build eruda
+        run: npm i && npm run build
+      - name: Publish package on NPM
+        working-directory: dist
+        run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}